-----Original Message-----
Nope, all this means is TCP/1723 is working fine. There is still a good
change GRE 47 is being blocked on one of the devices.
Well, you are the expert, so I ought to believe what you
are telling me. But if you are right, then this is one
very misleading utility!
FWIW, I may have written in haste about the test showing
that everything was working as it should.
Here, for instance, is the output to the console from the
client side:
{BEGIN PASTE}
Initializing WinSock...
Obtaining host information...
Successfully resolved server's host information
======================================
Enter data to send to server (between 1 and 255 chrs.),
then hit enter:
-->Is this a test of GRE or not?
Successfully connected to server using TCP port 1723 (PPTP)
Sending data to server
Waiting for a reply to the data which was just sent...
Received a reply. Reply contains the following text:
---> Hello, there! This is a reply from the server.
=================================
Connectivity test to TCP Port 1723 was successful!!!
Closing down socket...
=================================
Creating a socket to test GRE protocol traffic...
Total GRE packets sent = 1
Total GRE packets sent = 2
Total GRE packets sent = 3
Total GRE packets sent = 4
Total GRE packets sent = 5
=====================================
Check server to see if the GRE packets were received
successfully
=====================================
Closing down socket
Goodbye!
{END PASTE}
And this is the response output from the server side:
{BEGIN PASTE}
Now you must run pptpclnt.exe on remote machine
Waiting for inbound connection on TCP port 1723...
Inbound connection from client has completed successfully!
Data received from the client:
----> Is this a test of GRE or not?
Sending the message 'Reply from Server' to the client
=====================================================
Connectivity test to TCP Port 1723 was successful!!!
Closing down socket...
=====================================================
Created socket for GRE protocol test
Listening on PROTOCOL 47 for incoming GRE packets...
{END PASTE}
I now see that there are TWO tests occuring here; one for
Port 1723, and the other for Protocol 47. And at this
point, the server doesn't appear to be receiving
anything. So this indicates that there IS a problem with
GRE packets getting through.
There is a greping.exe and gresvr.exe as well to test.
So why should I need this? It appears to me that pptpping
DOES test for GRE packets on Protocol.
Well, this is progress of sorts, in that I know a little
more than I did earlier. I just found another, very
cryptic linksys kb article that tells me to change the lan
side ip address of the router from the default 192.168.1.1
to 192.168.254.1. What the kb article DOESN'T say, which
could be confusing to the less informed, is that if one is
using static ip addresses (and the linksys docs say NOT to
use the router dhcp if using pptp passthrough!) is that
this will break all static tcp/ip settings behind the
router that are pointing to a gateway of 192.168.1.1. So
to test this I'm going to have to some further
reconfiguration.
Thanks for the feedback.
-Basil
